About the Author: Edward Ghali, DSc, Dept. of Mining and Metallurgy, Laval University, Quebec City, Canada G1K 7P4 V. S. Sastri, Ph.D, Sai Ram Consultants, Ottawa, Ontario, Canada, K1J 6S7 Consulting in the fields of corrosion and corrosion control by inhibitors in sour gas systems, grinding balls, microbiological corrosion, corrosion of low-leaded copper-base alloys, hydrogen damage in high-strength and rail steels, galvanic corrosion of household plumbing solders and contamination of drinking water, surface quantification of corrosion products, electrochemical sensors for hydrogen in steels, reverse osmosis and water pollution and beneficiation of ores. M. Elboujdaini, Ph.D., Materials Technology Laboratories, CANMET, Ottawa, Ontario, Canada, K1A 0G1 Research Scientist and Group Leader/Corrosion & Protection at Natural Resources Canada, CANMET, Materials Technology Laboratory (MTL), Ottawa, Canada. Authority in hydrogen-induced cracking and material degradation in H2S environment; Coordinated complex and difficult tests on full-scale pipes in H2S environment for oil and gas industries; Provided critical technical information and consultative expertise to Canadian companies.